Planets

How many solar systems are there in the milky way?

The galactic center is an intense radio source known as Sagittarius A*, a supermassive black hole of 4,100 (± 0.03 million solar masses. This illustration shows what the surface of TRAPPIST-1f, one of the seven planets in the TRAPPIST-1 system, might look like. The apex of the Sun’s path, or solar apex, is the direction … Read more

Do gas giants have a solid surface?

These bodies are mostly composed of hydrogen at temperatures above the “hydrogen critical point”, which means that there is no clear boundary between solid, liquid and gas.  Do gas giants have a solid surface? The answer is that the two gas giants do not have a solid surface, and it would be impossible for a … Read more

Why do the gas giants have many moons?

Because gas giants are so massive, they are able to attract more satellites. The gas giants may be big, but the stars are much bigger. As such, they have much stronger gravitational fields. So when a hot Jupiter gets too close to its star, the star ends up stealing its moons. Why gas giants have … Read more

saturn

23 Saturn Facts | Awesome Facts about the planet Saturn

The planet Saturn has intrigued astronomers for centuries. Since it was first seen through a powerful telescope in the 17th Century, scientists have wondered what Saturn is made of, and how its rings came to be. Fortunately, nowadays we know a lot more about Saturn than we ever have before, after four successful missions. So, … Read more

How long did it take perseverance to get to Mars?

Giovanni made observations of Mars in 1672 from Paris, while his colleague, Jean Richer made the same observation from Cayenne, French Guiana. According to NASA’s Goddard Space Flight Center website, the ideal alignment for a Mars launch would allow reaching the planet in about nine months. In addition, the Earth’s proximity to the Sun would … Read more

Why are temperatures on the gas giants so low

The term gas giant was originally synonymous with giant planet, but in the 1990s it became known that Uranus and Neptune are actually a different class of giant planets, being composed mainly of heavier volatile substances (which are called ices ). A gas giant is a large planet composed mainly of gases, such as hydrogen … Read more

What are the terrestrial planets?

The largest terrestrial exoplanets (those at least twice the mass of Earth) are classified as super-Earths. The four inner, or terrestrial, planets, Mercury, Venus, Earth, and Mars have rocky compositions and densities greater than 3 grams per cubic centimeter. The planets Mercury, Venus, Earth, and Mars are called terrestrial because they have a compact, rocky … Read more

Is Venus red or yellow?

For the past few years, astrophotography enthusiasts like Mattias Malmer have been digging through the archives of old NASA missions, looking for data and color photos that they can combine and adjust into true-color images. Collage of NASA photos of different planets, including some false-color, color-enhanced, and artificial color radar topography. Although short-lived, it had … Read more

How do we weigh the earth?

Earth is the third planet from the Sun and the only known astronomical object that harbors and sustains life. About 29.2 percent of the Earth’s surface is land, made up of continents and islands. How many kilograms does the Earth weigh? If you plug in all these values and solve for M1, you get that … Read more

How many hours of light does Earth get?

Each location on Earth experiences an average of 12 hours of daylight per day, but the actual number of daylight hours on any given day of the year varies from place to place. How many hours of light does Earth get? how far away is jupiter from earth in light minutes? This means that the … Read more